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For optical remote sensing images which are contaminated by white Gaussian noise, in general, uniform features indicate the same spectral characteristic. Uniform features will present the same or similar digital number (DN) value with a certain band in imaging. Therefore, the DNs of the uniform features are highly correlated [1]. When dividing an image into small blocks to estimate noise standard-deviations...
Signal-to-noise ratios (SNRs) of optical remote sensing images with different intensity levels are different, and they can not be directly compared with each other. It is necessary to develop a scheme to deal with this problem on SNR estimation of optical remote sensing images. Radiance is a good parameter as the basis for comparison. Under the same radiance, comparisons between SNRs derived from...
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